NEO Dan , bjorno ,
First of all I am sorry for my bad english...
I am planning to buy Kicker 15L7D2 tomorrow and I need your precious advices . I have to go with Car Sub because I could not find HT Sub Driver in my town.
Tapped Horn Loaded design is too big for my room and I think that Kicker Square drivers playing agressively if you infront of the driver.
Could you please help me to find best possible 35 hz Bandpass design for this sub? Maybe I can get better result than sealed or ported designs for SQ .

This design is more efficient and has better response and power handling than the sealed box. Use the 2008 or 2011 S15L74 driver with the coils wired in series to make an 8 ohm speaker. This configuration will allow you to run up to two subwoofers on your bridged amp and give you >1000w each.